Shelf bracket



FIG. 1 is an isometric view of a shelf bracket embodying my design;

FIG. 2 is an end elevational view thereof, the opposite end elevational view being a mirror image;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a shelf bracket, as shown and described. 